Sash-balance.



D. HOYT.

SASH BALANCE.

APPLICATION FILED 00L 7. l9l2.

1 14,086. Patented Jan. 30, 1917.

2F iwm'yw W A TTOH/VEY IIWED ETATEE PATENT @FFQE.

DANIEL I-IOYT, OF EAST ORANGE, NEV JERSEY, ASSIGNOR OF ONE-HALF TO THE NATIONAL LOCK WASHER COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SASI-I-IBALANOE.

Patented J an. 39, 191?.

Application filed October 7, 1912. Serial No. 724,270.

To all whom it may concern:

Be it known that I, DANIEL HOYT, a citizen of the United States, residing in the city of East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Sash-Balances, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it pertains to make, construct, and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, forming a part of this specification.

Heretofore in the construction of sash balances to which my invention relates, it has been customary to employ a single chain, cord or the like, to connect the sash with the spring roller, one end of the chain or the like being secured near one end of the sprin roller and the other end passed down and under a pulley mounted on one corner of the sash, thence across the top of the sash and under another pulley mounted on the opposite corner of the sash, thence up to the opposite end of the spring roller and secured thereto. This construction has been found objectionable for the following reasons: First, the tension on the spring roller cannot be increased or decreased without dismounting the spring roller; second, the

chain extending between the pulleys across the top of the sash is apt to mar the latter and also to cause rattling, from the constant vibration of the .car; third, in the event of the chain breaking, the balance becomes useless; and fourth, when it is necessary to remove the sash, for overhauling the car, the spring roller has to be removed also as they are made inseparable.

My present invention aims to overcome these difiiculties.

In carrying out my invention, I make use of the structure illustrated in the accompanying drawings, in which Figure l-represents an upper portion of a window with my sash balance in position.

Fig. 2 represents an upper corner of a window frame showing one end of a spring roller with a cord instead of a chain disconnected from the sash, the end of the cord being made fast to a hook on the window frame, thus retaining the tension on the spring roller; and Fig. 3 represents a view of the pulley showing the position of the coupling after the chain has been broken.

Similar letters of reference refer to like parts throughout the specification and drawings.

In the drawings a represents the upper portion of a car window frame or heading as it is usually termed, 6 represents a sash adapted to slide therein and 0 represents a sash balance spring roller of the usual type, having but a single pawl which looks the tension on the roller before the latter is placed in the brackets, (not shown). The roller 0 is placed in the brackets with the pawl down and after the first pull on the chains the pawl drops from the ratchet, after which the spring tension is constant to wind up. The roller 0 is located in brackets near the top of the car heading a.

(5 represents a chain secured to one end of the roller 0 and d represents a similar chain secured to the opposite end of the roller.

On the top of the sash Z) and near each corner thereof are secured the pulleys c and 6 each having two upright sides and which support a pulley roller therebetween. The chains d and cl pass down from the spring roller 0 and under the pulley rollers as shown in Fig. 1. Between the pulleys e and e is located a third section of chain 7 which extends partly across the top of the sash b. At each end of the chain 7 is secured a coupling g and 9 consisting of a short rod h with a hook-shaped member at either end thereof. On each rod h is located a rubber member, the use of which I will presently describe. The side chains cl and cl are each hooked onto the couplings g and g, thus making a continuous chain in three sections, the side chains d and d being readily separated from the couplings when desired.

In assembling my sash balance I first wind up the tension on the spring roller 0 to lift about the weight of the sash b, the tension being locked by the roller pawl. I then secure the chains (Z and d to the roller 0, one at each end thereof. I then place the roller 0 in the brackets in the top of the heading with the roller pawl down. It is not necessary to remove the roller again from the brackets unless for repairs. I next insert the sash b in position in the window frame with the pulleys e and e secured to the sash near each top corner thereof, and pass the lower free ends of the chains d and (2 through the pulleys e and e and hook them on to the couplings g and g which are attached to the third section of chain f. I now release the roller pawl by pulling down on the chains d and d and the tension of the spring roller is exerted to lift the sash. I then try the balance by raising and lowering the sash b to determine if the proper tension is on the spring roller 0. In case I find there is not sufiicient ten sion on the roller I simply disengage the the free ends of the chains and cl around the roller 0 one or more times, as may be necessary and reattach them to the couplings. If I find there is too much tension on the roller I disengage the chains from the couplings andtake off one or more turns. This advantage of being able to adjust the tension on the roller to balance the weight of the sash without removing the roller is of great convenience and improvement.

Another advantage of my invention consists in the rubber members ,7 and'y" which are located on the rods 72, forming the couplings g and 9, before mentioned. These members may be made of any suitable material or shape, but should be of such size that they cannot pass through the openings of the pulleys, for reasons to be presently described. In service, these members act as fenders preventing the chain, extending between the pulleys, which is sometimes very long from striking the top edge of the sash and marring the same, and the striking of the chain against the sash which causes rattling, caused by the vibration of the cars, which is very annoying. These rubber members j and y" as before noted, should be of a size to prevent their passing through the openings of the pulleys, so that should the chain break in service the balance will still operate. Should the chain break between the couplings g and g the couplings v will fly to the pulleys, by the tension of the roller and as the rubber members j and 3" cannot pass the pulleys they will be held there, (see Fig. 3 of the'drawings) and the balance will still operate. Should the chain cl break, the coupling 9 will fiy to the pulley e and the balance will still operate with one chain, though not so well as with both chains. Should the chain d break the coupling 9 will fly to the pulley e and the balance will still operate.

Another advantage of my invention is that when the car is being overhauled the chains 0? and d can readily be detached from the couplings g and g and the ends of the chains secured to hooks i on the window frame adjacent the top of the sash, as clearly indicated in Fig. 2 of the drawings,

and the proper tension retained on the spring roller while the sash is removed for repainting and revarnishing, making it unnecessary to remove the spring rollerwhich is located at the top of the car heading and difficult to dismount. 7

While I have shown a specific construction and described the advantages thereof, I do not desire to be restricted to the exact construction shown and described, as various changes and details may be made without departing from the principles involved. For instance, I find that by lengthening the two side chains I am enabled to dispense with the third section of chain which extends partly across the top of the sash, and by connecting the ends of the two side chains with a single coupling, I can dispense with the additional coupling.

I claim: 7 l 1. In a device of the character described, the combination with a window frame, a spring roller mounted in said frame, a sash movable in the window frame, continuous connecting means between the spring roller and the sash, said connecting means extending across the top of the sash for actuation of said sash, sald continuous connectlng means being provided with means whereby the sash is prevented from falling 7 upon the sash is prevented from falling upon breakage of the chain.

3. The combination of a window frame, a sash adapted to move therein and having a pulley secured to each upper corner thereof, a sash balance spring rollersuspendedon pintles near the'top of the frame constantly tending to raise the sash, a connecting means secured to each end of the roller passing down through the pulleys, the ends of sald connectlng means attached to a conpling, the arrangement'being such that the connecting means may be readily attached to or detached from the couphng and the tensionretained on the sprlngroller, whereby the sash may be removed without re-' 7 moving the balance roller. 7 This specification signed and witnessed this 26th day of Sept. 1912.

DANIEL HOYT.

Witnessesi v FREDK. C. Frsonnn, JO A. MILLER.

Copies of this patent may be obtained for five cents each, by addressing the Gomnii ssion erof Patents, 7

Washington, D. G. V l 

